p*****e
发帖数: 58 | 1 When high frequecy electromagnetic wave meets metal (or any
conductor), it generates electric current which is highly
concentrated near the surface, and therefore the surface
becomes much hotter than the internal part of the conductor.
The higher the frequecy and the higher the conductivity, the
thinner the layer the current is confined to.
Now your food is inside a metal container which takes all
the microwave energy at its surface and the internal part
(including food) gets not energy. So you |
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j***i
发帖数: 1278 | 3 high frequecy 基本上就是当天买当天卖，这个目前应该很多都电脑化了，招你过去就
是写程序吧 |
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k**********4
发帖数: 16092 | 4 CT or MRI, but they will induce cancer if u do it too often.
American Cancer Society has a webpage for best frequecy of
checkups depending on age sex ,eta. |
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t******y
发帖数: 5040 | 5 【 以下文字转载自 PDA 讨论区 】
发信人: johnnie502 (Keep your feet on the ground.), 信区: PDA
标 题: 【圣诞活动】送自己的第一台Ham radio
发信站: BBS 未名空间站 (Wed Dec 26 11:07:03 2012, 美东)
刚来北美，所以没有什么朋友，只能送自己个礼物玩玩了。下面这个radio是圣诞节附
近买的，就权当是圣诞礼物吧！希望没有违规。
型号：宝峰BAOFENG UV-5R
价格：不到50刀
来源：amazon
产地：中国
买这个的原因是在国内的时候就有玩ham的想法，但是一直没有时间去实现。现在到了
北美有大段的时间，所以先买一个入门级的玩玩。
玩了几天，同时学习了很多ham相关的知识，知道了各种频率的区别，知道了什么是
repeater，也知道了没有ham license的话，发射电波是违法的。所以只是单方面的收
听，现在主要监听下面几个frequency:
146.760, VHF上的chicago ham club架设的repeater，基本上任何时候都有人在监听，
偶尔能听到有人聊天。有... 阅读全帖 |
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p****r
发帖数: 9164 | 6 lol. where did you learn hi-lo? it is really easy, but you need to convert
the running count to true count when use it. true count is running count/
remaining decks. NO such thing like RC 15 ,hehe.
usually you get a very small edge in TC 1, depends on rule. Most pro
advice a max bet on TC 5+. you can run cvdata to find the frequecy/edge etc
for each true count.
yesh. heat is big factor for playing BJ. I personally got barred by
most Vegas casino from playing BJ, but there are things ... 阅读全帖 |
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s*r
发帖数: 2757 | 7 call rate by ethnicity group
nearby snp frequecy |
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a*******r
发帖数: 344 | 8 My guess is as long as the frequecy of your expected exitation force (for
example truck running over a series of speed bumps) is far away from the
pipe's resonant frequency (and it is very likely so), your pipes are going to
be fine in terms of dynamic forces.
Worst case of scenario, your truck hit on speed bump at high speed, the
force transfered from timber block to pipe will be a pulse excitation. If
this is true, a dynamic amplification factor of 2 should be ok.
Buckling of pipe wall under i... 阅读全帖 |
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a*******r
发帖数: 344 | 9 My guess is as long as the frequecy of your expected exitation force (for
example truck running over a series of speed bumps) is far away from the
pipe's resonant frequency (and it is very likely so), your pipes are going to
be fine in terms of dynamic forces.
Worst case of scenario, your truck hit on speed bump at high speed, the
force transfered from timber block to pipe will be a pulse excitation. If
this is true, a dynamic amplification factor of 2 should be ok.
Buckling of pipe wall under i... 阅读全帖 |
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t*****x
发帖数: 68 | 10 【 以下文字转载自 EE 讨论区 】
【 原文由 tenesix 所发表 】
for a nonlinear system,( several exponential nonlinear components), is it
possible to use some treatments to get analytical solutions in
Frequency domain (using linear
approximations)?
Any book/paper suggested?
Thanks. |
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Z**n
发帖数: 95 | 11 谢谢您对Gabor的进一步介绍，所有的读者们都受益了。
１）Gabor limit，或 Heisenberg–Gabor limit， 连接了量子力学中的 海森堡
测不准原理 （Heisenberg's uncertainty principle ）与 ＥＥ 的信号处理中的
Time-Frequecy时频分析。
２）Gabor, D. [1946] Theory of communication. Journal of the Institute of
Electrical Engineering 93 429–457. |
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Z**n
发帖数: 95 | 12 谢谢您对Gabor的进一步介绍，所有的读者们都受益了。
１）Gabor limit，或 Heisenberg–Gabor limit， 连接了量子力学中的 海森堡
测不准原理 （Heisenberg's uncertainty principle ）与 ＥＥ 的信号处理中的
Time-Frequecy时频分析。
２）Gabor, D. [1946] Theory of communication. Journal of the Institute of
Electrical Engineering 93 429–457. |
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t*****x
发帖数: 68 | 13 【 以下文字转载自 EE 讨论区 】
【 原文由 tenesix 所发表 】
for a nonlinear system,( several exponential nonlinear componets), is it
possible to use some treatments to get analytical solutions (using linear
approximations)?
Any book/paper suggested?
Thanks. |
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o******e
发帖数: 4 | 14 Dilute solutions have strong hydrodynamic interactions. The Zimm modelworks
well and essntially all the solvent within the pervaded volume ofthe
polymer coil moves with the coil.
The situation is very different foran unentangled polymer melt.
Hydrodynamic interactions are screened andthe Rouse model applies. The Rouse
model will only describe your data at lowfrequency (frequencies below the
reciprocal of the Kuhn monomer time TAU0). But there is always a regime at
higher frequency (motions in |
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o******e
发帖数: 4 | 15 Dilute solutions have strong hydrodynamic interactions. The Zimm modelworks
well and essntially all the solvent within the pervaded volume ofthe
polymer coil moves with the coil.
The situation is very different foran unentangled polymer melt.
Hydrodynamic interactions are screened andthe Rouse model applies. The Rouse
model will only describe your data at lowfrequency (frequencies below the
reciprocal of the Kuhn monomer time TAU0). But there is always a regime at
higher frequency (motions insid |
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c*******n
发帖数: 1648 | 16 这个你自己都说了，跟CHEMISTRY有关。普适的物理MODEL应该没有，要用有化学细节的
MOLECULAR DYNAMICS处理。
modelworks
Rouse
relaxations? |
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d****s
发帖数: 174 | 17 in the section of Gene Mapping:
LOD=Log10 P theta/P50%
Since the linkage frequency (theta) should be always less than 50%, how
could it be possible to have the LOD >3?
Because linckage have less than 50% reconbination frequency, why it is
linkage rather than nonlinkage when the recombination frequecy increase?
THank! |
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